1. Present tense
1.
The
new study shows that happiness spreads through social networks like an
emotional virus
2. Past tense
1.
They
used information gathered over a period of twenty year
2.
That
study began sixty years ago in Framingham, Massachusetts, to learn more about
the risks of heart attack and stroke.
3.
The
new study found that friends of happy people had a greater chance of being
happy themselves
4.
People
removed by as much as three degrees of separation still had an effect on a
person's happiness
5.
The
study showed that having an extra five thousand dollars increased a person's
chances of becoming happier by about two percent
6.
The
researchers found that happiness really is contagious
7.
The
study described as the first to demonstrate the indirect spread of happiness
3. Future tense
1.
a
virus people would be happy to catch
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